Characterization of polarization-independent phase modulation method for practical plug and play quantum cryptography

Title
Characterization of polarization-independent phase modulation method for practical plug and play quantum cryptography
Authors
권오성이민수우민기박병권김일영김용수한상욱문성욱
Keywords
QKD system; double phase modulation; single phase modulation
Issue Date
2015-10
Publisher
Laser physics
Citation
VOL 25, NO 12, 1-5
Abstract
We characterized a polarization-independent phase modulation method, called double phase modulation, for a practical plug and play quantum key distribution (QKD) system. Following investigation of theoretical backgrounds, we applied the method to the practical QKD system and characterized the performance through comparing single phase modulation (SPM) and double phase modulation. Consequently, we obtained repeatable and accurate phase modulation confirmed by high visibility single photon interference even for input signals with arbitrary polarization. Further, the results show that only 80% of the bias voltage required in the case of single phase modulation is needed to obtain the target amount of phase modulation.
URI
http://pubs.kist.re.kr/handle/201004/50953
ISSN
1054660X
Appears in Collections:
KIST Publication > Article
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